Polymerase chain reaction instrument



FIG. 1 is a front perspective view of a first embodiment of a polymerase chain reaction instrument;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a front perspective view of a second embodiment of a polymerase chain reaction instrument;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a side view thereof;

FIG. 12 is another side view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof.

The broken lines shown in the drawings illustrate portions of the polymerase chain reaction instrument that form no part of the claimed design.

The ornamental design for a polymerase chain reaction instrument capable of being used for analysis of biological samples. 

CLAIM The ornamental design for a polymerase chain reaction instrument, as shown and described. 